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dockerd-rootless.sh: if no slirp4netns, try pasta

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Signed-off-by: Rob Murray <rob.murray@docker.com>
This commit is contained in:
Rob Murray
2025-10-09 09:08:20 +01:00
parent 6bbb92df70
commit 7e63d2a81b
1 changed files with 38 additions and 14 deletions
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52
contrib/dockerd-rootless.sh
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@@ -9,13 +9,20 @@
# * Either one of slirp4netns (>= v0.4.0), VPNKit, lxc-user-nic needs to be installed.
#
# Recognized environment variables:
# * DOCKERD_ROOTLESS_ROOTLESSKIT_STATE_DIR=DIR: the rootlesskit state dir. Defaults to "$XDG_RUNTIME_DIR/dockerd-rootless".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_NET=(slirp4netns|vpnkit|pasta|lxc-user-nic): the rootlesskit network driver. Defaults to "slirp4netns" if slirp4netns (>= v0.4.0) is installed. Otherwise defaults to "vpnkit".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_MTU=NUM: the MTU value for the rootlesskit network driver. Defaults to 65520 for slirp4netns, 1500 for other drivers.
# * DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER=(builtin|slirp4netns|implicit): the rootlesskit port driver. Defaults to "builtin".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX=(auto|true|false): whether to protect slirp4netns with a dedicated mount namespace. Defaults to "auto".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP=(auto|true|false): whether to protect slirp4netns with seccomp. Defaults to "auto".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_DISABLE_HOST_LOOPBACK=(true|false): prohibit connections to 127.0.0.1 on the host (including via 10.0.2.2, in the case of slirp4netns). Defaults to "true".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_STATE_DIR=DIR: the rootlesskit state dir.
# * Defaults to "$XDG_RUNTIME_DIR/dockerd-rootless".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_NET=(slirp4netns|vpnkit|pasta|lxc-user-nic): the rootlesskit network driver.
# * Defaults to "slirp4netns" if slirp4netns (>= v0.4.0) is installed, else "pasta", else "vpnkit".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_MTU=NUM: the MTU value for the rootlesskit network driver.
# * Defaults to 65520 for slirp4netns and pasta, 1500 for other rootlesskit network drivers.
# * DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER=(builtin|slirp4netns|implicit): the rootlesskit port driver.
# * Defaults to "implicit" for "pasta", "builtin" for other rootlesskit network drivers.
# * DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX=(auto|true|false): whether to protect slirp4netns with a dedicated mount namespace.
# * Defaults to "auto".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP=(auto|true|false): whether to protect slirp4netns with seccomp.
# * Defaults to "auto".
# * DOCKERD_ROOTLESS_ROOTLESSKIT_DISABLE_HOST_LOOPBACK=(true|false): prohibit connections to 127.0.0.1 on the host (including via 10.0.2.2, in the case of slirp4netns).
# * Defaults to "true".
# To apply an environment variable via systemd, create ~/.config/systemd/user/docker.service.d/override.conf as follows,
# and run `systemctl --user daemon-reload && systemctl --user restart docker`:
@@ -93,11 +100,12 @@ fi
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_STATE_DIR:=$XDG_RUNTIME_DIR/dockerd-rootless}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_NET:=}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_MTU:=}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER:=builtin}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER:=}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX:=auto}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP:=auto}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_DISABLE_HOST_LOOPBACK:=}"
net=$DOCKERD_ROOTLESS_ROOTLESSKIT_NET
port_driver=$DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER
mtu=$DOCKERD_ROOTLESS_ROOTLESSKIT_MTU
if [ -z "$net" ]; then
if command -v slirp4netns > /dev/null 2>&1; then
@@ -108,20 +116,36 @@ if [ -z "$net" ]; then
mtu=65520
fi
else
echo "slirp4netns found but seems older than v0.4.0. Falling back to VPNKit."
echo "slirp4netns found but seems older than v0.4.0. Checking for other network drivers."
fi
fi
if [ -z "$net" ]; then
if command -v pasta > /dev/null 2>&1; then
net=pasta
fi
fi
if [ -z "$net" ]; then
if command -v vpnkit > /dev/null 2>&1; then
net=vpnkit
else
echo "Either slirp4netns (>= v0.4.0) or vpnkit needs to be installed"
exit 1
fi
fi
if [ -z "$net" ]; then
echo "One of slirp4netns (>= v0.4.0), pasta (passt >= 2023_12_04), or vpnkit needs to be installed"
fi
fi
if [ -z "$mtu" ]; then
mtu=1500
if [ "$net" = pasta ]; then
mtu=65520
else
mtu=1500
fi
fi
if [ -z "$port_driver" ]; then
if [ "$net" = pasta ]; then
port_driver=implicit
else
port_driver=builtin
fi
fi
host_loopback="--disable-host-loopback"
@@ -156,7 +180,7 @@ if [ -z "$_DOCKERD_ROOTLESS_CHILD" ]; then
--net=$net --mtu=$mtu \
--slirp4netns-sandbox=$DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX \
--slirp4netns-seccomp=$DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP \
$host_loopback --port-driver=$DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER \
$host_loopback --port-driver=$port_driver \
--copy-up=/etc --copy-up=/run \
--propagation=rslave \
$DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS \